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基于价格抵扣规则下建设用地指标序贯拍卖定价机制

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管理工程学报 2024年第5期38卷 251-262页

作者：刘靖羽孟卫东李宇雨黄波重庆师范大学经济与管理学院重庆401331 重庆大学经济与工商管理学院重庆400044

如何有效缓解城市用地高需求与农村用地低效率并存的矛盾是中国实现可持续发展的重要环节之一。在厘清建设用地指标内在价值的基础上,本文考虑价格抵扣的现实规则,改进了传统的互补品序贯拍卖模型,设计出具有可操作性的建设用地指标定... 详细信息

如何有效缓解城市用地高需求与农村用地低效率并存的矛盾是中国实现可持续发展的重要环节之一。在厘清建设用地指标内在价值的基础上,本文考虑价格抵扣的现实规则,改进了传统的互补品序贯拍卖模型,设计出具有可操作性的建设用地指标定价机制。本文通过理论推导和数值模拟对模型的解进行分析,发现价格抵扣额度与建设用地指标、建设用地的报价正相关,即增大价格抵扣额度可以提高农民复垦积极性,且抵扣额度越高,效果越好。此外,建设用地指标报价随竞标人数增多而降低,且建设用地指标报价随土地闲置费用的提高而提高,即土地闲置费用可有效地提高用地指标报价。基于此,本文针对结论得出了相关的政策建议。

关键词：建设用地指标改进序贯拍卖价格抵扣定价机制土地利用效率

基于多种污染物损害视角的跨界环境治理合作策略研究

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运筹与管理 2024年第5期33卷 175-181页

作者：凌星元孟卫东黄波重庆大学经济与工商管理学院重庆400044

本文在多种(非累积性和累积性)污染物释放造成不同损害的背景下,利用最优控制理论构造跨界污染最优治理的博弈模型,探讨非合作、合作下两个相邻地区的跨界污染治理策略,包含治污努力程度等,探究累积性污染物存量随时间推移的演变情况,... 详细信息

本文在多种(非累积性和累积性)污染物释放造成不同损害的背景下,利用最优控制理论构造跨界污染最优治理的博弈模型,探讨非合作、合作下两个相邻地区的跨界污染治理策略,包含治污努力程度等,探究累积性污染物存量随时间推移的演变情况,并对比分析非合作与合作下的最优解。博弈模型和数值分析结果显示:合作治污下,各地区关注非累积性污染物对临近地区产生的环境损害;各地区采取的治污努力程度可能高于非合作治污下;全部地区的整体收益高于非合作治污下,且合作剩余主要受累积性污染物存量损害程度、非累积性污染物对相邻地区损害程度等因素的影响,与非累积性污染物对本地区损害程度不相关。最后,通过数值仿真,验证模型的有效性,并分析合作治污下相关参数的灵敏性,为促使地方政府合作治污提供理论依据。

关键词：环境治理合作策略跨界污染非累积性污染物累积性污染物

DYNAMIC PORTFOLIO CHOICE UNDER THE TIME-VARYING,JUMPS,AND KNIGHT UNCERTAINTY OF ASSET RETURN PROCESS

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Journal of Systems Science & Complexity 2012年第5期25卷 896-908页

作者： Chaolin HE weidong meng School of Management Engineering Anhui Polytechnic University College of Economics and Business Administration Chongqing University

By introducing a stochastic element to the double-jump diffusion framework to measure the Knight uncertainty of asset return process, this paper builds the model of dynamic portfolio choice, which maximizes the expected utility of terminal portfolio wealth. Through specifying the state function of uncertainty-aversion, it utilizes the max-min method to derive the analytical solution of the model to study the effect of the time-varying, jumps, and Knight uncertainty of asset return process on dynamic portfolio choice and their interactions. Results of comparative analysis show： The time-varying results in positive or negative intertemporal hedging demand of portfolio, which depends on the coefficient of investor＇s risk aversion and the correlation coefficient between return shift and volatility shift; the jumps in asset return overall reduce investor＇s demand for the risky asset, which can be enhanced or weakened by the jumps in volatility; due to the existing of the Knight uncertainty, the investor avoids taking large position on risky asset, and the resulting is the improving of portfolio＇s steady and immunity. At last, an empirical study is done based on the samples of Shanghai Exchange Composite Index monthly return data from January 1997 to December 2009, which not only tests the theoretical analysis but also demonstrates that the proposed method in the paper is useful from the aspect of portfotio＇s equivalent utility.

关键词： Conditional characteristic function dynamic portfolio jumps Knight uncertainty spec-tral generalized method of moments time-varying.

可见光催化烯烃的三组分串联三氟甲基化/偕二氟烯丙基化

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Journal of Donghua University(English Edition) 2024年第1期41卷 57-71页

作者：袁汶雯黄焰根孟卫东东华大学化学与化工学院上海201620

描述了一种高效的可见光诱导富电子烯烃的三氟甲基化/偕二氟烯丙基化三组分串联反应。三氟甲基(—CF_(3))自由基由市售的三氟甲磺酸钠(CF_(3)SO_(2)Na)生成,依次与富电子烯烃和α-三氟甲基烯烃相匹配,最后通过β-F消除得到多氟烯烃。该... 详细信息

描述了一种高效的可见光诱导富电子烯烃的三氟甲基化/偕二氟烯丙基化三组分串联反应。三氟甲基(—CF_(3))自由基由市售的三氟甲磺酸钠(CF_(3)SO_(2)Na)生成,依次与富电子烯烃和α-三氟甲基烯烃相匹配,最后通过β-F消除得到多氟烯烃。该方法的优点是反应条件温和,官能团耐受性好,底物范围广,反应效率高,为药物和天然产物衍生物的后期改性提供了更多可能。

关键词：自由基加成三氟甲基化偕二氟烯丙基化烯烃

基于改进互补品序贯拍卖模型的建设用地指标定价机制

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运筹与管理 2024年第1期33卷 179-183页

作者：孟卫东刘靖羽黄波李宇雨重庆大学经济与工商管理学院重庆400044 重庆师范大学经济与管理学院重庆401331

在引入用地指标与土地间相互依存特征前提下,本文改进了传统的互补品序贯拍卖模型,以期提出具有针对性的用地指标定价方法。研究表明,建设用地指标的成交价格受竞标人数和土地闲置费用的影响。竞标人指标报价随竞标人数递增而降低,但随... 详细信息

在引入用地指标与土地间相互依存特征前提下,本文改进了传统的互补品序贯拍卖模型,以期提出具有针对性的用地指标定价方法。研究表明,建设用地指标的成交价格受竞标人数和土地闲置费用的影响。竞标人指标报价随竞标人数递增而降低,但随土地闲置费递增而递增。进一步分析表明,适当提高土地闲置费用及资质审核要求可最大程度显化指标核心价值,激发农民退出闲置宅基地的积极性,提高农村用地的使用效率。研究为盘活农村闲置土地资产,实现可持续化发展给予了一定的理论参考。

关键词：建设用地指标改进的互补品序贯拍卖定价机制土地利用效率

Self-assembled structure of cyanine dyes: J-aggregates characteristics on optical information storing microcrystals

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Rare Metals 2006年第Z1期25卷 158-162页

作者： JIANG Xiaoli LI Xiaowei LAI weidong meng Tao FENG Xiaomin ZHANG Jixian College of Physics Science & Technology Hebei University Baoding 071002 China College of Physics Science & Technology Hebei University Baoding 071002 China College of Physics Science & Technology Hebei University Baoding 071002 China College of Physics Science & Technology Hebei University Baoding 071002 China College of Physics Science & Technology Hebei University Baoding 071002 China College of Physics Science & Technology Hebei University Baoding 071002 China

Dye sensitization is a fundamental function for solar cell and silver halide (AgX) microcrystal to increase the optoelectronic conversion efficiency. In this paper, the spectral properties and self-assembled structure of three types of cyanine dyes, adsorbed both on (100) surface of 0.4 μm AgBr cubic crystal and (111) surface of 1.8 μm AgBr tabular crystal, were studied with combination of spectroscopy and atomic force microscopy (AFM) technique. Rectangular aggregation structure is formed on the crystal faces of (100) and (111) for both anionic and cationic dyes, while herringbone-stacking structure is formed by anionic-cationic dye, and a J-band spectrum is correspondingly detected. The photoelectron property of dye-sensitized samples was also investigated with microwave absorption and dielectric spectrum detection technology. After excited by a 355 nm fast-pulse laser, the photoelectron decay process of anionic-cationic dye sensitized sample is the fastest. This indicates that the affection of anionic-cationic dye aggregates to the photoelectron decay is the biggest, and the sensitization is more efficient.

关键词： dye sensitization aggregate optoelectronic conversion photoelectron

Facile syntheses of 3-trifluoromethylthio substituted thioflavones and benzothiophenes via the radical cyclization

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Chinese Chemical Letters 2021年第1期32卷 389-392页

作者： Lu Wang Huaiyu Wang weidong meng Xiu-Hua Xu Yangen Huang Key Laboratory of Science and Technology of Eco-Textiles Ministry of EducationCollege of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai 201620China Key Laboratory of Organofluorine Chemistry Shanghai Institute of Organic ChemistryChinese Academy of SciencesShanghai 200032China

3-CF3 S substituted thioflavones and benzothiophenes were achieved via the reactions of AgSCF3 with methylthiolated alkynones and alkynylthioanisoles,respectively,promoted by *** protocol possesses good functional group tolerance and high *** studies suggested that a classic two-step radical process was involved,which includes addition of CF3 S radical to triple bond and cyclization with SMe moiety.

关键词： Trifluoromethylthiolation Radical cyclization Thioflavone Benzothiophene Methylthiolated alkynone Alkynylthioanisole

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肉苁蓉原浆口服液制备工艺优化及其成分分析

食品研究与开发 2024年第19期45卷 132-139页

作者：舒文莉叶英孟卫东郭俊祥王红韦唯青海大学农牧学院青海西宁810016 青海道康农牧科技有限公司青海西宁816100

以柴达木盆地新鲜肉苁蓉为原料,采用单因素试验研究肉苁蓉原浆添加量、枸杞原浆添加量、黄果梨原浆添加量、白砂糖添加量对口服液感官评分的影响。以感官评分为评价标准,对肉苁蓉原浆口服液的制备工艺进行响应面试验优化,同时检测产品... 详细信息

以柴达木盆地新鲜肉苁蓉为原料,采用单因素试验研究肉苁蓉原浆添加量、枸杞原浆添加量、黄果梨原浆添加量、白砂糖添加量对口服液感官评分的影响。以感官评分为评价标准,对肉苁蓉原浆口服液的制备工艺进行响应面试验优化,同时检测产品的理化指标和微生物指标。结果表明:制备肉苁蓉原浆口服液的最佳工艺条件为黄果梨原浆添加量20%、枸杞原浆添加量19%、肉苁蓉原浆添加量14%、白砂糖添加量9%。在该制备工艺条件下,肉苁蓉原浆口服液pH4.37、可溶性固形物含量16%、离心沉淀率5.92%、总酸含量4.69 g/L、还原糖含量32.10 g/L、总糖含量50.10 g/L、多酚含量99.97 mg/L、黄酮含量0.21 mg/100 g、松果菊苷含量0.05 g/L、毛蕊花糖苷含量0.01 g/L,且大肠杆菌和菌落总数符合GB 7101—2022《食品安全国家标准饮料》,得到一款具有肉苁蓉独特风味的复合口服液。

关键词：肉苁蓉口服液理化性质工艺优化成分分析

Characteristics of the Ownership Structure of Chinese Listed Companies and Its Effect on Financial Reports Quality

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Chinese Business Review 2003年第1期2卷 77-81页

作者： weidong meng Fengming Tao male Ph.D candidate＇s supervisor Economics and Administration College of Chongqing University Chongqing 400044 female Ph.D candidate Economics and Administration College of Chongqing University Chongqing 400044 P.R.China

Ownership structure is brand-new to the reform of Chinese state-owned enterprises, and also a problem that urgently need to study. Because the reform wasn＇t entire, the ownership structure of Chinese listed companies looks freakish. That is to say, the ownership is highly concentrated in the state, who has just no tangible rights to control the business, which results in ＂insider control＂, ＂owner absence＂, ＂duality of manager and chairman＂, and so on. At the same time, such an ownership structure is unavoidable to supply inducement to the people who has relative benefits in it, and it eventually affects the quality of their financial reports. This paper empirically studies the ownership structure of Chinese listed companies and their characteristics in the actual situation, and finally puts forward some suggestions on how to improve the quality of the financial reports from the ownership structure approach.

关键词： ownership structures the quality of financial report